NASA s HYPULSE facility at GASL has been reconfigured to permit free jet testing of the Hyper-X flowpath at flight Mach numbers of 7 and 10. Among the required changes are addition of a converging-diverging nozzle to permit operation in a reflected shock tunnel mode, a 7 ft. diameter test cabin and a 30 in. diameter contoured nozzle. However, none of these changes were allowed to interfere with rapid recovery of the prior shock-expansion tunnel mode of operation, and indeed certain changes should enhance facility usefulness and productivity in either mode. A previously-developed shock-induced detonation mode of driving the facility has been successfully applied to both reflected shock tunnel operation at Mach 10 flight conditions, with tailored interface operation, and shock-expansion tunnel operation at flight conditions corresponding to Mach numbers from 12 to 25. Tailored interface operation at Mach 7 has been achieved with an unheated helium driver. In the present paper, the rationale for a dual mode shock expansion/reflected shock tunnel is discussed, and the capabilities and limitations for each mode are outlined. The physical changes in the HYPULSE facility to achieve dual mode capability are also described. Limited calibration data obtained to date in the new reflected shock tunnel mode are presented and the anticipated flight simulation map with dual mode operation is also outlined.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Dual Mode Shock-Expansion/Reflected-Shock Tunnel


    Contributors:

    Publication date :

    1998-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Dual Mode Shock-Expansion/Reflected-Shock Tunnel

    Erdos, J. I. / Bakos, R. J. / Clayton Rogers, R. et al. | British Library Conference Proceedings | 1997


    Dual mode shock-expansion/reflected-shock tunnel

    Erdos, John / Bakos, Robert / Castrogiovanni, Anthony et al. | AIAA | 1997


    Dual Mode Shock-Expansion/Reflected-Schock Tunnel

    J. I. Erdos / R. J. Bakos / A. Castrogiovanni et al. | NTIS | 2004